1 | /* |
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2 | * FCKeditor - The text editor for internet |
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3 | * Copyright (C) 2003-2006 Frederico Caldeira Knabben |
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4 | * |
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5 | * Licensed under the terms of the GNU Lesser General Public License: |
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6 | * http://www.opensource.org/licenses/lgpl-license.php |
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7 | * |
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8 | * For further information visit: |
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9 | * http://www.fckeditor.net/ |
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10 | * |
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11 | * "Support Open Source software. What about a donation today?" |
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12 | * |
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13 | * File Name: fckundo_ie.js |
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14 | * IE specific implementation for the Undo/Redo system. |
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15 | * |
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16 | * File Authors: |
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17 | * Frederico Caldeira Knabben (fredck@fckeditor.net) |
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18 | */ |
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19 | |
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20 | var FCKUndo = new Object() ; |
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21 | |
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22 | FCKUndo.SavedData = new Array() ; |
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23 | FCKUndo.CurrentIndex = -1 ; |
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24 | FCKUndo.TypesCount = FCKUndo.MaxTypes = 25 ; |
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25 | FCKUndo.Typing = false ; |
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26 | |
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27 | FCKUndo.SaveUndoStep = function() |
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28 | { |
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29 | if ( FCK.EditMode != FCK_EDITMODE_WYSIWYG ) |
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30 | return ; |
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31 | |
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32 | // Shrink the array to the current level. |
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33 | FCKUndo.SavedData = FCKUndo.SavedData.slice( 0, FCKUndo.CurrentIndex + 1 ) ; |
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34 | |
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35 | // Get the Actual HTML. |
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36 | var sHtml = FCK.EditorDocument.body.innerHTML ; |
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37 | |
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38 | // Cancel operation if the new step is identical to the previous one. |
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39 | if ( FCKUndo.CurrentIndex >= 0 && sHtml == FCKUndo.SavedData[ FCKUndo.CurrentIndex ][0] ) |
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40 | return ; |
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41 | |
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42 | // If we reach the Maximun number of undo levels, we must remove the first |
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43 | // entry of the list shifting all elements. |
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44 | if ( FCKUndo.CurrentIndex + 1 >= FCKConfig.MaxUndoLevels ) |
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45 | FCKUndo.SavedData.shift() ; |
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46 | else |
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47 | FCKUndo.CurrentIndex++ ; |
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48 | |
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49 | // Get the actual selection. |
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50 | var sBookmark ; |
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51 | if ( FCK.EditorDocument.selection.type == 'Text' ) |
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52 | sBookmark = FCK.EditorDocument.selection.createRange().getBookmark() ; |
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53 | |
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54 | // Save the new level in front of the actual position. |
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55 | FCKUndo.SavedData[ FCKUndo.CurrentIndex ] = [ sHtml, sBookmark ] ; |
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56 | |
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57 | FCK.Events.FireEvent( "OnSelectionChange" ) ; |
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58 | } |
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59 | |
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60 | FCKUndo.CheckUndoState = function() |
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61 | { |
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62 | return ( FCKUndo.Typing || FCKUndo.CurrentIndex > 0 ) ; |
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63 | } |
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64 | |
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65 | FCKUndo.CheckRedoState = function() |
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66 | { |
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67 | return ( !FCKUndo.Typing && FCKUndo.CurrentIndex < ( FCKUndo.SavedData.length - 1 ) ) ; |
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68 | } |
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69 | |
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70 | FCKUndo.Undo = function() |
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71 | { |
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72 | if ( FCKUndo.CheckUndoState() ) |
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73 | { |
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74 | // If it is the first step. |
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75 | if ( FCKUndo.CurrentIndex == ( FCKUndo.SavedData.length - 1 ) ) |
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76 | { |
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77 | // Save the actual state for a possible "Redo" call. |
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78 | FCKUndo.SaveUndoStep() ; |
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79 | } |
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80 | |
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81 | // Go a step back. |
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82 | FCKUndo._ApplyUndoLevel( --FCKUndo.CurrentIndex ) ; |
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83 | |
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84 | FCK.Events.FireEvent( "OnSelectionChange" ) ; |
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85 | } |
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86 | } |
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87 | |
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88 | FCKUndo.Redo = function() |
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89 | { |
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90 | if ( FCKUndo.CheckRedoState() ) |
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91 | { |
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92 | // Go a step forward. |
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93 | FCKUndo._ApplyUndoLevel( ++FCKUndo.CurrentIndex ) ; |
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94 | |
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95 | FCK.Events.FireEvent( "OnSelectionChange" ) ; |
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96 | } |
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97 | } |
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98 | |
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99 | FCKUndo._ApplyUndoLevel = function(level) |
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100 | { |
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101 | var oData = FCKUndo.SavedData[ level ] ; |
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102 | |
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103 | if ( !oData ) |
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104 | return ; |
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105 | |
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106 | // Update the editor contents with that step data. |
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107 | FCK.SetInnerHtml( oData[0] ) ; |
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108 | // FCK.EditorDocument.body.innerHTML = oData[0] ; |
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109 | |
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110 | if ( oData[1] ) |
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111 | { |
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112 | var oRange = FCK.EditorDocument.selection.createRange() ; |
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113 | oRange.moveToBookmark( oData[1] ) ; |
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114 | oRange.select() ; |
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115 | } |
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116 | |
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117 | FCKUndo.TypesCount = 0 ; |
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118 | FCKUndo.Typing = false ; |
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119 | } |
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